TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Ekmedžić, Marko
AU  - Krpić, D.
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5553
AB  - Results are presented of a search for the production of new particles decaying to pairs of partons (quarks, antiquarks, or gluons), in the dijet mass spectrum in proton-proton collisions at root s = 8 TeV. The data sample corresponds to an integrated luminosity of 4.0 fb(-1), collected with the CMS detector at the LHC in 2012. No significant evidence for narrow resonance production is observed. Upper limits are set at the 95% confidence level on the production cross section of hypothetical new particles decaying to quark-quark, quark-gluon, or gluon-gluon final states. These limits are then translated into lower limits on the masses of new resonances in specific scenarios of physics beyond the standard model. The limits reach up to 4.8 TeV, depending on the model, and extend previous exclusions from similar searches performed at lower collision energies. For the first time mass limits are set for the Randall-Sundrum graviton model in the dijet channel.
T2  - Physical Review D
T1  - Search for narrow resonances using the dijet mass spectrum in pp collisions at root s=8 TeV
VL  - 87
IS  - 11
DO  - 10.1103/PhysRevD.87.114015
ER  - 

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2013",
abstract = "Results are presented of a search for the production of new particles decaying to pairs of partons (quarks, antiquarks, or gluons), in the dijet mass spectrum in proton-proton collisions at root s = 8 TeV. The data sample corresponds to an integrated luminosity of 4.0 fb(-1), collected with the CMS detector at the LHC in 2012. No significant evidence for narrow resonance production is observed. Upper limits are set at the 95% confidence level on the production cross section of hypothetical new particles decaying to quark-quark, quark-gluon, or gluon-gluon final states. These limits are then translated into lower limits on the masses of new resonances in specific scenarios of physics beyond the standard model. The limits reach up to 4.8 TeV, depending on the model, and extend previous exclusions from similar searches performed at lower collision energies. For the first time mass limits are set for the Randall-Sundrum graviton model in the dijet channel.",
journal = "Physical Review D",
title = "Search for narrow resonances using the dijet mass spectrum in pp collisions at root s=8 TeV",
volume = "87",
number = "11",
doi = "10.1103/PhysRevD.87.114015"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2013). Search for narrow resonances using the dijet mass spectrum in pp collisions at root s=8 TeV. in Physical Review D, 87(11).
https://doi.org/10.1103/PhysRevD.87.114015

Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Search for narrow resonances using the dijet mass spectrum in pp collisions at root s=8 TeV. in Physical Review D. 2013;87(11).
doi:10.1103/PhysRevD.87.114015 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Search for narrow resonances using the dijet mass spectrum in pp collisions at root s=8 TeV" in Physical Review D, 87, no. 11 (2013),
https://doi.org/10.1103/PhysRevD.87.114015 . .

TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Krpić, D.
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5526
AB  - Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 fb(-1) sample of proton-proton collisions at root s = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m GT 220 GeV (for c tau LT 500 mm), as well as on the proper decay length of the lightest neutralino, c tau GT 6000 mm (for m LT 150 GeV). (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
T2  - Physics Letters B
T1  - Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV
VL  - 722
IS  - 4-5
SP  - 273
EP  - 294
DO  - 10.1016/j.physletb.2013.04.027
ER  - 

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2013",
abstract = "Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 fb(-1) sample of proton-proton collisions at root s = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m GT 220 GeV (for c tau LT 500 mm), as well as on the proper decay length of the lightest neutralino, c tau GT 6000 mm (for m LT 150 GeV). (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.",
journal = "Physics Letters B",
title = "Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV",
volume = "722",
number = "4-5",
pages = "273-294",
doi = "10.1016/j.physletb.2013.04.027"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2013). Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV. in Physics Letters B, 722(4-5), 273-294.
https://doi.org/10.1016/j.physletb.2013.04.027

Chatrchyan S, Adžić P, Đorđević M, Krpić D, Milošević J, Milenović P, Reković V. Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV. in Physics Letters B. 2013;722(4-5):273-294.
doi:10.1016/j.physletb.2013.04.027 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV" in Physics Letters B, 722, no. 4-5 (2013):273-294,
https://doi.org/10.1016/j.physletb.2013.04.027 . .

TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Ekmedžić, Marko
AU  - Krpić, D.
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5525
AB  - Measurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC at root s = 7 TeV correspond to an integrated luminosity of 5.0 fb(-1). The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. Results are presented as a function of jet multiplicity, for inclusive Z boson production and for Z bosons with transverse momenta greater than 150 GeV, and compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z + 1-jet events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
T2  - Physics Letters B
T1  - Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV
VL  - 722
IS  - 4-5
SP  - 238
EP  - 261
DO  - 10.1016/j.physletb.2013.04.025
ER  - 

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2013",
abstract = "Measurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC at root s = 7 TeV correspond to an integrated luminosity of 5.0 fb(-1). The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. Results are presented as a function of jet multiplicity, for inclusive Z boson production and for Z bosons with transverse momenta greater than 150 GeV, and compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z + 1-jet events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.",
journal = "Physics Letters B",
title = "Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV",
volume = "722",
number = "4-5",
pages = "238-261",
doi = "10.1016/j.physletb.2013.04.025"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2013). Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV. in Physics Letters B, 722(4-5), 238-261.
https://doi.org/10.1016/j.physletb.2013.04.025

Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV. in Physics Letters B. 2013;722(4-5):238-261.
doi:10.1016/j.physletb.2013.04.025 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Event shapes and azimuthal correlations in Z plus jets events in pp collisions at root s=7 TeV" in Physics Letters B, 722, no. 4-5 (2013):238-261,
https://doi.org/10.1016/j.physletb.2013.04.025 . .

TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Ekmedžić, Marko
AU  - Krpić, D.
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5476
AB  - The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at root s = 7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb(-1), recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of t (t) over barZ events and a same-sign dilepton analysis of t (t) over barV (V = W or Z) events. In the trilepton channel a direct measurement of the t (t) over barZ cross section sigma(t (t) over barZ) = 0.28(-0.11)(+0.14) (stat)(-0.03)(+0.06) (syst) pb is obtained. In the dilepton channel a measurement of the t (t) over barV cross section yields sigma(t (t) over barV) = 0.43(-0.15)(+0.17) (stat)(-0.07)(+0.09) (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137(-0.016)(+0.012) and 0.306(-0.053)(+0.031) pb. DOI: 10.1103/PhysRevLett.110.172002
T2  - Physical Review Letters
T1  - Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV
VL  - 110
IS  - 17
DO  - 10.1103/PhysRevLett.110.172002
ER  - 

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2013",
abstract = "The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at root s = 7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb(-1), recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of t (t) over barZ events and a same-sign dilepton analysis of t (t) over barV (V = W or Z) events. In the trilepton channel a direct measurement of the t (t) over barZ cross section sigma(t (t) over barZ) = 0.28(-0.11)(+0.14) (stat)(-0.03)(+0.06) (syst) pb is obtained. In the dilepton channel a measurement of the t (t) over barV cross section yields sigma(t (t) over barV) = 0.43(-0.15)(+0.17) (stat)(-0.07)(+0.09) (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137(-0.016)(+0.012) and 0.306(-0.053)(+0.031) pb. DOI: 10.1103/PhysRevLett.110.172002",
journal = "Physical Review Letters",
title = "Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV",
volume = "110",
number = "17",
doi = "10.1103/PhysRevLett.110.172002"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2013). Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV. in Physical Review Letters, 110(17).
https://doi.org/10.1103/PhysRevLett.110.172002

Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV. in Physical Review Letters. 2013;110(17).
doi:10.1103/PhysRevLett.110.172002 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at root s=7 TeV" in Physical Review Letters, 110, no. 17 (2013),
https://doi.org/10.1103/PhysRevLett.110.172002 . .